\begin{table}%t3 \par \caption {\label{tab:lines}List of strongest \ion{Fe}{viii} lines in the 100--500~\AA\ range. } %\centerline {\tiny \begin{tabular}[c]{@{}ccccrlllll@{}} \hline \hline \noalign{\smallskip} $i-j$ & Levels & Int & $gf$ & G00 & Z03 D & $A_{ji}$(s$^{-1}$) & $\lambda_{\rm exp}$(\AA) & $\lambda_{\rm th}$(\AA) & ID \\ \hline %inserts single line 2--49 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$D$_{5/2}$ & 1.0 & 7.06 & 9.1 & 7.2 & $2.8 \times 10^{11}$ & 168.173 & 159.73 & G65 \\ 2--46 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$F$_{7/2}$ & 0.90 & 3.92 & 5.8 & 4.2 & $9.5 \times 10^{10}$ & 185.213 & 178.09 & G65 \\ 1--50 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$D$_{3/2}$ & 0.58 & 4.56 & 5.9 & 4.6 & $2.7 \times 10^{11}$ & 167.486 & 159.20 & G65 \\ 2--48 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$P$_{3/2}$ & 0.57 & 3.82 & 4.3 & 3.7 & $2.2 \times 10^{11}$ & 168.544 & 162.16 & RR80 \\ 1--45 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$F$_{5/2}$ & 0.58 & 2.80 & 4.1 & 2.9 & $9.0 \times 10^{10}$ & 186.599 & 179.25 & G65 \\ 1--47 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$P$_{1/2}$ & 0.29 & 2.10 & 2.4 & 2.0 & $2.4 \times 10^{11}$ & 168.929 & 162.43 & RR80 \\ 2--43 & 3p$^6$3d $^2$D$_{5/2}$--3p$^6$4p $^2$P$_{3/2}$ & 0.29 & 0.67 & 0.60 & -- & $3.0 \times 10^{10}$ & 194.661 & 191.39 & RR80 \\ 2--54 & 3p$^6$3d $^2$D$_{5/2}$--3p$^6$4f $^2$F$_{7/2}$ & 0.14 & 4.30 & 4.0 & -- & $2.1 \times 10^{11}$ & 131.240 & 129.02 & KW37 \\ 1--42 & 3p$^6$3d $^2$D$_{3/2}$--3p$^6$4p $^2$P$_{1/2}$ & 0.17 & 0.38 & 0.38 & -- & $3.3 \times 10^{10}$ & 195.972 & 192.88 & ? RR80 \\ 1--53 & 3p$^6$3d $^2$D$_{3/2}$--3p$^6$4f $^2$F$_{5/2}$ & $9.0\times 10^{-2}$ & 2.97 & 2.8 & -- & $1.9 \times 10^{11}$ & 130.941 & 128.71 & KW37 \\ 2--26 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$F$_{7/2}$ & 0.14 & 0.14 & 0.10 & -- & $2.2 \times 10^{9}$ & 224.305 & 223.88 & RR80 \\ 2--6 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$D$_{7/2}$ & 0.15 & $2.1\times 10^{-4}$ & $2.2 \times 10^{-4}$ & -- & $2.8 \times 10^{6}$ & 253.956 & 257.79 & N \\ 2--22 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$F$_{7/2}$ & 0.12 & $5.6\times 10^{-2}$ & $5.2 \times 10^{-2}$ & -- & $8.8 \times 10^{8}$ & 231.097 & 231.15 & RR80 \\ 2--9 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$G$_{7/2}$ & $9.9 \times 10^{-2}$ & $1.0 \times 10^{-4}$ & $7.0 \times 10^{-5}$ & -- & $1.4\times 10^{6}$ & -- & 243.92 & \\ 2--17 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$F$_{7/2}$ & $9.5 \times 10^{-2}$ & $8.1 \times 10^{-4}$ & $4.8 \times 10^{-4}$ & -- & $1.2 \times 10^{7}$ & -- & 235.41 & \\ 2--21 & 3p$^6$3d $^2$D$_{5/2}$--3p$^6$4s $^2$S$_{1/2}$ & $8.9 \times 10^{-2}$ & -- & 0.0 & -- & $6.5 \times 10^{5}$ & -- & 231.69 & \\ 1--30 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$F$_{5/2}$ & $8.1\times 10^{-2}$ & 0.12 & 0.10 & -- & $2.9\times 10^{9}$ & 217.691 & 217.17 & RR80 \\ 1--49 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$D$_{5/2}$ & $6.1 \times 10^{-2}$ & 0.43 & 0.57 & 0.51 & $1.7\times 10^{10}$ & 167.655 & 159.24 & G65 \\ 2--50 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$D$_{3/2}$ & $5.6 \times 10^{-2}$ & 0.44 & 0.64 & 0.51 & $2.6 \times 10^{10}$ & 168.003 & 159.69 & G65 \\ 1--48 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$P$_{3/2}$ & $5.5 \times 10^{-2}$ & 0.37 & 0.48 & 0.41 & $2.2 \times 10^{10}$ & 168.024 & 161.65 & RR80 \\ 2--5 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$D$_{5/2}$ & $8.3 \times 10^{-2}$ & $2.4 \times 10^{-4}$ & $2.2\times 10^{-4}$ & -- & $4.0\times 10^{6}$ & 255.350 & 259.31 & N \\ 2-24 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$P$_{3/2}$ & $7.3 \times 10^{-2}$ & $2.2 \times 10^{-2}$ & $1.6\times 10^{-2}$ & $2.1 \times 10^{-2}$ & $7.2 \times 10^{8}$ & 225.396 & 225.29 & N \\ 2-31 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$D$_{7/2}$ & $7.0 \times 10^{-2}$ & $1.3\times 10^{-4}$ & $1.1 \times 10^{-4}$ & -- & $2.2 \times 10^{6}$ & -- & 217.51 & \\ 2--16 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$F$_{9/2}$ & $7.2\times 10^{-2}$ & $4.5 \times 10^{-12}$ & 0.0 & -- & 45. & -- & 235.87 & \\ 1--19 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$F$_{5/2}$ & $6.7\times 10^{-2}$ & $4.1\times 10^{-2}$ & $3.2 \times 10^{-2}$ & -- & $8.5 \times 10^{8}$ & 231.884 & 232.05 & RR80 \\ 2--18 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$D$_{5/2}$ & $6.7\times 10^{-2}$ & $8.8\times 10^{-4}$ & $1.6 \times 10^{-6}$ & -- & $1.8\times 10^{7}$ & -- & 233.49 & \\ 2--27 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$G$_{7/2}$ & $6.3 \times 10^{-2}$ & $1.1 \times 10^{-2}$ & $3.6 \times 10^{-2}$ & -- & $1.8\times 10^{8}$ & 222.190 & 222.57 & N \\ 2--41 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$P$_{3/2}$ & $5.2\times 10^{-2}$ & $9.9 \times 10^{-2}$ & 0.19 & 0.13 & $4.3 \times 10^{9}$ & 197.362 & 194.03 & RR80 \\ 1--21 & 3p$^6$3d $^2$D$_{3/2}$--3p$^6$4s $^2$S$_{1/2}$ & $5.9 \times 10^{-2}$ & -- & 0.0 & -- & $4.3 \times 10^{5}$ & -- & 230.66 & \\ 1--36 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$D$_{5/2}$ & $5.3 \times 10^{-2}$ & $3.7 \times 10^{-3}$ & $2.2 \times 10^{-3}$ & -- & $9.5\times 10^{7}$ & 207.124 & 205.01 & N \\ 2--10 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$P$_{5/2}$ & $5.9 \times 10^{-2}$ & $1.3 \times 10^{-4}$ & $1.0\times 10^{-4}$ & -- & $2.5\times 10^{6}$ & -- & 243.30 & \\ 1--4 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$D$_{3/2}$ & $5.1\times 10^{-2}$ & $1.1\times 10^{-4}$ & $1.1\times 10^{-4}$ & -- & $2.8\times 10^{6}$ & 255.110 & 259.05 & N \\ 2--20 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$D$_{3/2}$ & $4.5 \times 10^{-2}$ & $6.0\times 10^{-3}$ & $3.3\times 10^{-3}$ & -- & $1.9\times 10^{8}$ & -- & 232.52 & \\ 2--40 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$G$_{7/2}$ & $3.9 \times 10^{-2}$ & $2.2\times 10^{-2}$ & $1.8\times 10^{-2}$ & -- & $4.3\times 10^{8}$ & 204.704 & 203.12 & N \\ 1--15 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$F$_{5/2}$ & $4.2\times 10^{-2}$ & $5.8\times 10^{-3}$ & $3.9\times 10^{-3}$ & -- & $1.2\times 10^{8}$ & -- & 235.12 & \\ 2--32 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$D$_{5/2}$ & $3.5\times 10^{-2}$ & $2.8 \times10^{-3}$ & $1.6\times 10^{-3}$ & -- & $6.5\times 10^{7}$ & -- & 216.87 & \\ 1--14 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$F$_{3/2}$ & $3.8\times 10^{-2}$ & $5.7\times 10^{-3}$ & $4.9 \times 10^{-3}$ & -- & $1.7 \times 10^{8}$ & -- & 235.83 & \\ 1--43 & 3p$^6$3d $^2$D$_{3/2}$--3p$^6$4p $^2$P$_{3/2}$ & $3.1 \times 10^{-2}$ & $7.1\times 10^{-2}$ & $6.1\times 10^{-2}$ & -- & $3.2 \times 10^{9}$ & 193.968 & 190.69 & RR80 \\ 1--23 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$P$_{1/2}$ & $3.4\times 10^{-2}$ & $1.5\times 10^{-2}$ & $1.0 \times 10^{-2}$ & -- & $9.4\times 10^{8}$ & 227.290 & 227.10 & N \\ 2--45 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$F$_{5/2}$ & $2.5 \times 10^{-2}$ & 0.12 & 0.21 & 0.20 & $3.9\times 10^{9}$ & 187.240 & 179.87 & RR80 \\ 1--35 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$D$_{3/2}$ & $2.2 \times 10^{-2}$ & $2.6\times 10^{-3}$ & $1.9\times 10^{-3}$ & -- & $9.8\times 10^{7}$ & -- & 206.68 & \\ 2--11 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$G$_{5/2}$ & $2.4\times 10^{-2}$ & $5.5\times 10^{-5}$ & $6.2\times 10^{-5}$ & -- & $1.1\times 10^{6}$ & -- & 242.64 & \\ 1--3 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$D$_{1/2}$ & $2.5\times 10^{-2}$ & $1.6\times 10^{-5}$ & $1.8\times 10^{-5}$ & -- & $8.0\times 10^{5}$ & 255.684 & 259.66 & N \\ 1--44 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$P$_{1/2}$ & $1.6\times 10^{-2}$ & $4.0\times 10^{-2}$ & $5.9\times 10^{-2}$ & $6.0\times 10^{-2}$ & $3.6\times 10^{9}$ & 192.004 & 188.74 & ? RR80 \\ 2--12 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$P$_{3/2}$ & $1.9\times 10^{-2}$ & $7.6\times 10^{-5}$ & $1.2\times 10^{-4}$ & -- & $2.2\times 10^{6}$ & -- & 241.53 & \\ 2--25 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$H$_{11/2}$ & $1.6 10^{-2}$ & $1.0\times 10^{-10}$ & 0.0 & -- & 1.1 & -- & 224.95 & \\ 2--33 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$D$_{3/2}$ & $1.6 \times 10^{-2}$ & $2.9\times 10^{-3}$ & $2.3 \times 10^{-3}$ & -- & $1.0 \times 10^{8}$ & -- & 215.96 & \\ 2--15 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$F$_{5/2}$ & $1.6 \times 10^{-2}$ & $2.3\times 10^{-3}$ & $2.6\times 10^{-3}$ & -- & $4.6\times 10^{7}$ & -- & 236.19 & \\ 2--28 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$G$_{9/2}$ & $1.5 \times 10^{-2}$ & $8.2 \times 10^{-11}$ & 0.0 & -- & 9.7 & -- & 221.16 & \\ 2--37 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$S$_{3/2}$ & $1.3 \times 10^{-2}$ & $7.9 \times 10^{-3}$ & $6.2 \times 10^{-3}$ & -- & $3.1\times 10^{8}$ & 207.124 & 204.74 & \\ 2--30 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$F$_{5/2}$ & $1.3 \times 10^{-2}$ & $2.0 \times 10^{-2}$ & $1.8\times 10^{-2}$ & -- & $4.7\times 10^{8}$ & 218.564 & 218.09 & RR80 \\ 1--10 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$P$_{5/2}$ & $1.4 \times 10^{-2}$ & $3.1 \times 10^{-5}$ & $2.7\times 10^{-5}$ & -- & $6.0 \times 10^{5}$ & -- & 242.16 & \\ 1--13 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$P$_{1/2}$ & $1.4 \times 10^{-2}$ & $1.5 \times 10^{-5}$ & $2.5 \times 10^{-5}$ & -- & $8.7 \times 10^{5}$ & -- & 239.13 & \\ 2--53 & 3p$^6$3d $^2$D$_{5/2}$--3p$^6$4f $^2$F$_{5/2}$ & $6.5\times 10^{-3}$ & 0.22 & 0.20 & -- & $1.4 \times 10^{10}$ & 131.257 & 129.03 & RR80 \\ 1--12 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$P$_{3/2}$ & $1.2\times 10^{-2}$ & $4.8 \times 10^{-5}$ & $5.1\times 10^{-5}$ & -- & $1.4\times 10^{6}$ & -- & 240.40 & \\ 1--41 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^2$P$_{3/2}$ & $9.6 \times 10^{-3}$ & $1.8 \times 10^{-2}$ & $2.8\times 10^{-2}$ & $1.5 \times 10^{-2}$ & $7.8\times 10^{8}$ & 196.650 & 193.30 & RR80 \\ 2--35 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$D$_{3/2}$ & $8.7 \times 10^{-3}$ & $1.0 \times 10^{-3}$ & $6.8\times 10^{-4}$ & -- & $4.0 \times 10^{7}$ & -- & 207.51 & \\ 1--34 & 3p$^6$3d $^2$D$_{3/2}$--3p$^5$3d$^2$ $^4$D$_{1/2}$ & $8.9 \times 10^{-3}$ & $2.7 \times 10^{-3}$ & $2.0\times 10^{-3}$ & -- & $1.9\times 10^{8}$ & -- & 214.21 & \\ 2--8 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^4$G$_{9/2}$ & $9.6 \times 10^{-3}$ & $1.1 \times 10^{-12}$ & 0.0 & -- & 0.82 & -- & 245.12 & \\ 2--19 & 3p$^6$3d $^2$D$_{5/2}$--3p$^5$3d$^2$ $^2$F$_{5/2}$ & $8.9\times 10^{-3}$ & $5.5 \times 10^{-3}$ & $6.0\times 10^{-3}$ & -- & $1.1\times 10^{8}$ & 232.876 & 233.10 & RR80 \\ \hline \end{tabular}} \par \smallskip \par Notes: {the relative intensities (photons) ${\rm Int}=N_{j} A_{ji}/N_{\rm e}$ are normalised to the strongest transition and were calculated at an electron density of 10$^{9}$~cm$^{-3}$ and log $T$[K]~=~5.6. Weighted oscillator strengths $gf$ and \mbox{A-values} (s$^{-1}$) are from the benchmark calculation. The $gf$ values from G00 and the Z03 (case~D) calculation are also listed. $\lambda_{\rm exp}$ are our experimental wavelengths, while $\lambda_{\rm th}$ are the theoretical ones from the G00~energies. The last column (ID) provides a key to previous identifications. N indicates a new one proposed here.} \end{table}